Concrete pipe.



W. G. PARMLEY.

CONCRETE PIPE.

APPLICATION FILED AUG. 4, 1910.

Patented Mar. 30, 1915.

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o e srnrnsggrnnr OFFICE.

WALTER C. PARKLEY, F 'UEPER MONTCLAIR, NEW J concns'rn PiPE.

Specification of Letters Patent. Patented I 30 1915 Application filedAugust 4, 1910. Serial No. 575,587.

To all 10. mm it may concern:

Be itknown that 1, ri'nm'un C; PARMLEY,

' a citizen of the United States, residing at Upper Montcluir, in thecounty of Essex and State of New Jersey, have invented a certain new anduseful Improvement in Concrolc Pipes, of which the following is a full.

clear, and exact description.

My invention relates to concrete pipes and more particularly to the formof joint for connecting adjacent sections of the pipe.

' The object of the invention is to provide a pipe, the opposite ends ofwhich are formed to cooperate with ends of adjacent sections so thateach section may be self-centering, and furthermore, to providegroovesin the adjacent sections which cooperate to form a blind recess for thepurpose of receiving mortar or grout, and thereby forming a perfectjoint between the adjacent sections of pipe. Generally speaking, theinvention ,com prises the elements and combinations thereof set forth inthe accompanying claims. 1

Reference should. be had to the accompanying drawings, n which- Figurelis a side elevation of a plurality of sections of pipe in assembledposition, certain portions being shown in section; F 1g. 2 is a sectionupon the line 2'2 of Fig. 1; Fig.

3 is a central vertical section of the showing in Fig. l; and Fig. 4 isa section upon the line 4-4 of 3. g

The common huh and spigot pattern for connecting pipe sections, which iswell known in the art, presents great dilliculties to obtaining apcrfectjoint. on account of the'difiiculty of obtaining ujoiutconiple'tcl y filled wit-humortar. Furthermore, it often happens thatthe spigot sinks down in the mortar and thus throws the pipes out oalinement.

.It has been proposed to providc an erternol groove, and in connectiontherewith, a. bandencircling the pipe uiclosing the groove andthereafter filling the groove with mortar, but, in such a "construction,there great danger that theband will be displaced and send or gritbecouiejannncd into the place intended for the mortar. In those plpeswhich are provided with an internal groove, it is practically impossibleto prevent water washing the mortar out. of place before it has hadtinieto harden.

The purpose of this invention is to provide a groove between adjacentsections of pipe to v which the water tlirolwh the pipe does not haveready access. and further. to provide a blind groove, which, beingfilled with mortar in the form of grout forms a perfectconnoc tionbetween the adjacent pipe sections.

The pipes are preferably formed bymoldlug. and such 21 molded pipe isreprescnted'ut 1.. The lower portion of the pipe is formed witha'fluttened base, as indicated at 2, which formszrsuitablc foundationupon which the pipe may rest and thereby prevent-the rollmgoi' the pipeafter it has once been laid in posltlon.

Added strength is given to the pipes-by providing some form ofreinforcing elements therein, and for this'purpose I have shown a wovenwire mat or screen. indica ted at 3, which is molded in the walls of thepipe and extends a short distance beyond each end thereof. Other formsof reinforcing elemcnts may be used, where desired, the point being thatthey shall extend beyond the ends of the pipe for a purpose to be laterdescribed.

At one end, the pipe is forined with an I quite so great as the lengthof the spigotfl.

A section of pipe is formed at its opposite ends in the manner suggestedund the end having the groove 7 is adapted to cooperate witlnun adjacentsection of pipe formed with the roove (5. The extending portion 4 ofeach pipe is formed of such :1 length that the spigot end of one sectionof pipomuy abut against the shoulder T? of the hub and still provide aslight space between the abutting pipe sections, which isv representedut 9. By the provision of such a space, the pipes may be shovedtogether, I

and be placed so that the ends coiipcrutc in the manner suggested inFig.3, without hindrance from gravel or dirt which might collect infront of the shoulder 5, the

pipes are shoved together. .Such gravel as collects may occupy the spacein the groove 9 and not prevent the pipe sections from a close fit. vThe spigot or extension 4 is substantially the same in external diameteras the internal diameter of the recess 7, so that when the adjacentsections of pipe coiiperate,

shown in Fig. 6, 10 correctly centered. 1 The groove (3 will coiiperzitewith the cess 7 when adjacent pipe sections are in their finallyadjusted-position, and into this space may be poured mortar or groutthrough the openings 10 or 10. The mortar or grout, being soft, willflow. around and fill the space provided by the grooves -6 and 7 andthus the joints between the pipes. will be completely'filled and packed.The extending reinforcing elements 3,

which hare before been mentioned, will eX- tcnd into the space providedby the grooves I 6 and 7 and will overlap each other, and, 1 when themortar is poured in and becomes hardened, an eli'ective locking means isprovidcd to hold the pipe sections together.

It will be apparent that when the various pipe sections are assembled, acontinuous intcrior surface is provided, and furthermore, any waterwhich may flow through the pipes, does not gain access to the mortar 1which fills the grooves. i pipes may be put in use as soon as'they arelaid and before the mortar in the grooves becomes entirely hard, andthis without danger of the water passing through the pipes washingthe.,m0rtar away.

While Ihave shown the hub end of the pipe as having a portion of greaterexternal 40 diameter than the diameter of the remaining portion ofthe'pipe, it will be apparent that such a projection is not necessaryand the adjacent sections are series iherefcre, the

that the pipe may be made of constant ternal diameter throughout itslength.

Attention is called to the fact that reentrant grooves are avoided inthe joint between the pipes, vherefore the pipe may be withdrawn fromthe mold in whieh it is made by a motion parallel with the axis of the iipe. This is quite an important feature, for the reason that no speciai'acesare required for producing the grc-oi'es in the pipe and in thisthe-cost of manufacture is materially reduced.

Having thus described my intention, what I claim is p r 1. A concretepipe section having a hell shaped end formed with a groove, the walls ofthe groove being substantially at right angles to each other, theopposite end of said pipe being formed with-a projecting portion of lossdiameter than the 121"}8, and

of substantially the same diameter as the interior of the groove in thehell end of" the pipe, and agroove formed in the said-proeetuig portionat the end thereof.

2. ii concrete pipesection having a bell shaped end formed with a groovethe walls of which at :tantiaily right angles to each other, theopposite end of said pipe section being formed with projecting portionof less diameter than the pipe, and of substantially the saine'diameteras the in terior diameter of the groove in the bell end of the pipe,said projecting portion being longer than the depth of the groove of thesaid projecting portionat the end thereof.

WALTER O. Y 11L MLEY. Witnesses: v

E. A. MeDERMo'rr, FinnEsrW. EISEN OHR.

bell portion, and a groove formed in the

